package com.zhuoyue.common.utils;

import java.lang.management.ManagementFactory;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;

import org.apache.commons.lang3.time.DateFormatUtils;

/**
 * 时间工具类
 *
 * @author hewenze
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils {
    public static String YYYY = "yyyy";

    public static String YYYY_MM = "yyyy-MM";

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

    public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";

    private static String[] parsePatterns = {
            "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM",
            "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
            "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};

    /**
     * 获取当前Date型日期
     *
     * @return Date() 当前日期
     */
    public static Date getNowDate() {
        return new Date();
    }

    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     *
     * @return String
     */
    public static String getDate() {
        return dateTimeNow(YYYY_MM_DD);
    }

    public static final String getTime() {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }

    public static final String dateTimeNow() {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static final String dateTimeNow(final String format) {
        return parseDateToStr(format, new Date());
    }

    public static final String dateTime(final Date date) {
        return parseDateToStr(YYYY_MM_DD, date);
    }

    public static final String parseDateToStr(final String format, final Date date) {
        return new SimpleDateFormat(format).format(date);
    }

    public static final Date dateTime(final String format, final String ts) {
        try {
            return new SimpleDateFormat(format).parse(ts);
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * 日期路径 即年/月/日 如2018/08/08
     */
    public static final String datePath() {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }

    /**
     * 日期路径 即年/月/日 如20180808
     */
    public static final String dateTime() {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyyMMdd");
    }

    /**
     * 日期型字符串转化为日期 格式
     */
    public static Date parseDate(Object str) {
        if (str == null) {
            return null;
        }
        try {
            return parseDate(str.toString(), parsePatterns);
        } catch (ParseException e) {
            return null;
        }
    }

    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate() {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 计算两个时间差
     */
    public static String getDatePoor(Date endDate, Date nowDate) {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endDate.getTime() - nowDate.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        return day + "天" + hour + "小时" + min + "分钟";
    }

    /**
     * 获取昨日同时刻的date, 如当前时刻为2021-08-18 16:59:20, 则结果为2021-08-17 16:59:20
     *
     * @return
     */
    public static Date getYesterdayTime() {
        // 当前时间
        Date date = new Date();
        Calendar calendar = new GregorianCalendar();
        calendar.setTime(date);
        // 把日期往前减少一天，若想把日期向后推一天则将负数改为正数
        calendar.add(Calendar.DATE, -1);
        date = calendar.getTime();
        return date;
    }

    /**
     * 查询某一天的起始时间, 如传入2021-8-18 16:59:20, 则结果为2021-08-17 00:00:00
     *
     * @param date
     * @return
     */
    public static Date getStartTimeOfDay(Date date) {
        Calendar calendar = new GregorianCalendar();
        calendar.setTime(date);
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);

        return calendar.getTime();
    }

    /**
     * 查询某一天的结束时间, 如传入2021-8-18 16:59:20, 则结果为2021-08-17 23:59:59
     *
     * @param date
     * @return
     */
    public static Date getEndTimeOfDay(Date date) {
        Calendar calendar = new GregorianCalendar();
        calendar.setTime(date);
        calendar.set(Calendar.HOUR_OF_DAY, 23);
        calendar.set(Calendar.MINUTE, 59);
        calendar.set(Calendar.SECOND, 59);

        return calendar.getTime();
    }

    /**
     * 获取昨天的起始与结束时间
     *
     * @return
     */
    public static List<Date> getYesterdayStartAndEndDate() {
        List<Date> result = new ArrayList<>(2);

        // 当前时间
        Date date = new Date();
        Calendar calendar = new GregorianCalendar();
        calendar.setTime(date);
        // 把日期往前减少一天，若想把日期向后推一天则将负数改为正数
        calendar.add(Calendar.DATE, -1);

        // 起始时、分、秒都为0
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        Date startTime = calendar.getTime();

        calendar.set(Calendar.HOUR, 23);
        calendar.set(Calendar.MINUTE, 59);
        calendar.set(Calendar.SECOND, 59);
        Date endTime = calendar.getTime();

        result.add(startTime);
        result.add(endTime);
        return result;
    }

    /**
     * 获取今天之前的七日的日期字符串(不包含今天)
     *
     * @return
     */
    public static List<String> getDateBeforeToday(int count) {
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
        List<String> dateStringList = new ArrayList<>(7);
        // 当前时间
        Date date = new Date();
        Calendar calendar = new GregorianCalendar();
        calendar.setTime(date);

        // 循环相应天数
        while (count-- > 0) {
            calendar.add(Calendar.DATE, -1);
            dateStringList.add(formatter.format(calendar.getTime()));
        }

        return dateStringList;
    }

    /**
     * 获取两个时间之间的日期字符串
     *
     * @param startTime
     * @param endTime
     * @return
     */
    public static List<String> getDateRange(Date startTime, Date endTime) {
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
        List<String> dateStringList = new ArrayList<>();

        if (startTime == null) {
            return dateStringList;
        }

        Calendar calendar = new GregorianCalendar();
        calendar.setTime(startTime);
        dateStringList.add(formatter.format(calendar.getTime()));
        int count = subDate(startTime, endTime);
        while (count-- > 0) {
            calendar.add(Calendar.DATE, 1);
            dateStringList.add(formatter.format(calendar.getTime()));
        }

        return dateStringList;
    }

    /**
     * 获取两个时间之间相差的天数
     *
     * @param startTime
     * @param endTime
     * @return 天数差值（绝对值）
     */
    public static int subDate(Date startTime, Date endTime) {
        int subDays = 0;
        if (startTime == null || endTime == null || startTime.equals(endTime)) {
            return subDays;
        }
        subDays = (int) ((endTime.getTime() - startTime.getTime()) / (24 * 60 * 60 * 1000));
        return Math.abs(subDays);
    }
}
